Sokoban game

Adding keyboard controls and unlimited undos

Emanuele Feronato has published the second part of his Sokoban tutorial.

"The new year begins with an improvement to the Phaser Sokoban game I showed you last november. I got quite a number of messages asking to turning it into a more finished game, so I added keyboard control – you can also play with arrow keys – and unlimited undos, which you can use pressing u key."